Gavin Cain, an SFPD homicide inspector, is in the middle of an exhumation when his phone rings. San Francisco's mayor is being blackmailed and has ordered Cain back to the city; a helicopter is on its way. The casket, and Cain's cold-case investigation, must wait. At City Hall, the mayor shows Cain four photographs he's received: the first, an unforgettable blonde; the second, pills and handcuffs on a nightstand; the third, the woman drinking from...